Anti-coring device for use with bit mounting means on mining, earth working and digging machines

Claim 2

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said mounting means having a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said at least one surface, said shank receiving perforation at said opening being countersunk, said countersink forming a gaugedetermining abutment surface adapted to cooperate with a matching gauge-determining abutment surface on said bit, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means, means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said anti-coring device having a perforation therethrough so positioned therein as to be coaxial with said shank receiving perforation when said anticoring device is in position on said mounting means, said perforation in said anti-coring device being so sized as to expose said gauge-determining abutment surface on said mounting means.

Claim 3

The structure claimed in claim 1 wherein said shank of said bit, said shank receiving perforation and said perforation in said anti-coring device are of circular cross section, said perforations being so sized with respect to said bit shank that said shank is freely rotatable in said perforations.

Claim 4

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means, means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said last mentioned means comprising a tongue on said anti-coring device, said mounting means having a slot-forming means on said at least one surface, said tongue being configured to be received in said slot with a frictional fit.

Claim 5

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means, means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said last mentioned means comprising a tongue on said anti-coring device, said mounting means having a slot-forming means on said at least one surface, said tongue being configured to be received in said slot with a frictional fit.

Claim 6

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means and means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said last mentioned means comprising a tongue on said anti-coring device, said driven element to which said mounting means is affixed having a slot-forming means thereon, said tongue being Configured to be received in said slot with a frictional fit.

Claim 7

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means and means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said last mentioned means comprising a tongue on said anti-coring device, said driven element to which said mounting means is affixed having a slot-forming means thereon, said tongue being Configured to be received in said slot with a frictional fit.

Claim 8

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said mounting means being of the type having a substantially rectangular block-like configuration with rearward, top, bottom and side surfaces as well as said at least one forward surface, said mounting means having a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said top surface of said mounting means, said anti-coring device comprising a disposable element of substantially L-shaped configuration having a first portion adapted to cover said forward surface of said mounting means and a second portion adapted to cover a part at least of said top surface of said mounting means and means for detachably maintaining said anti-coring device on said mounting means with said first portion of said anti-coring device covering said forward surface of said mounting means and said second portion of said anti-coring device covering a part at least of said top surface of said mounting means.

Claim 9

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said mounting means being of the type having a substantially rectangular block-like configuration with rearward, top, bottom and side surfaces as well as said at least one forward surface, said mounting means having a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said top surface of said mounting means, said anti-coring device comprising a disposable element of substantially L-shaped configuration having a first portion adapted to cover said forward surface of said mounting means and a second portion adapted to cover a part at least of said top surface of said mounting means and means for detachably maintaining said anti-coring device on said mounting means with said first portion of said anti-coring device covering said forward surface of said mounting means and said second portion of said anti-coring device covering a part at least of said top surface of said mounting means.

Claim 10

The structure claimed in claim 5 wherein said second portion of said anti-coring device has a notch therein exposing said shank receiving perforation.

Claim 11

The structure claimed in claim 6 including a tongue on said first portion of said anti-coring device, a slot forming means on said forward surface of said mounting means, said tongue being configured to be received in said slot with a frictional fit.

Claim 12

The structure claimed in claim 5 wherein said second portion of said anti-coring device has a perforation therein adapted to be coaxial with said shank receiving perforation when said anti-coring device is in position on said mounting means, said perforation in said anti-coring device having a cross sectional configuration of at least the same dimensions as those of said shank receiving perforation.

Claim 13

The structure claimed in claim 8 including a tongue on said first portion of said anti-coring device, a slot-forming means on said forward surface of said mounting means, said tongue being configured to be received in said slot with a frictional fit.

Claim 14

The structure claimed in claim 8 wherein said second portion of said anti-coring device adjacent said perforation therein comprises a gauge-determining abutment surface for said bit.

Claim 15

The structure claimed in claim 10 wherein said first portion of said anti-coring device is provided with a hook-like configuration adapted to engage said bottom of said mounting means adjacent the juncture of said bottom and said forward surface of said mounting means.

Claim 16

The structure claimed in claim 11 including lug means on said anti-coring device, said lug means being configured to engage said mounting means to prevent movement of said anti-coring device transversely of said mounting means.

Claim 17

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring and a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said at least one surface, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means, means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said anti-coring device having a perforation therethrough, said perforation in said anti-coring device being so positioned in said anti-coring device as to be coaxial with said shank receiving perforation when said anti-coring device is maintained at said at least oNe surface of said mounting means, whereby said shank of said bit will extend through said perforation in said anti-coring device and into said shank receiving perforation, said perforation in said anti-coring device being countersunk to form a surface flaring outwardly from said shank receiving perforation, said flaring surface comprising an abutment surface adapted to cooperate with a matching gauge-determining abutment surface on said bit.

Claim 18

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring and a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said at least one surface, said anti-coring device comprising a disposable element adapted to cover a part at least of said at least one surface of said mounting means, means for detachably maintaining said anti-coring device at said at least one surface of said mounting means, said anti-coring device having a perforation therethrough, said perforation in said anti-coring device being so positioned in said anti-coring device as to be coaxial with said shank receiving perforation when said anti-coring device is maintained at said at least oNe surface of said mounting means, whereby said shank of said bit will extend through said perforation in said anti-coring device and into said shank receiving perforation, said perforation in said anti-coring device being countersunk to form a surface flaring outwardly from said shank receiving perforation, said flaring surface comprising an abutment surface adapted to cooperate with a matching gauge-determining abutment surface on said bit.

Claim 19

The structure claimed in claim 13 wherein said shank of said bit, said shank receiving perforation and said perforation in said anti-coring device are of circular cross section, said perforations being so sized with respect to said bit shank that said shank is freely rotatable in said perforations.

Claim 20

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said mounting means having a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said at least one surface, said anti-coring device comprising a disposable element adapted to lie in abutment with and substantially cover said at least one surface of said mounting means and having a peripheral shape substantially the same as that of said at least one surface subject to coring, means for detachably maintaining said anti-coring device in abutment with said at least one surface of said mounting means, said anti-coring device having a perforation therethrough, said perforation in said anti-coring device being so positioned in said anti-coring device as to be coaxial with said shank receiving perforation when said anti-coring device is maintained in abutment with said at least one surface of said mounting means, whereby said shank of said bit will extend through said perforation in said anti-coring device and into said shank receiving perforation, said shank receiving perforation in said mounting means and said bit shank being of circular cross section and so sized that said bit shank is rotatable within said shank receiving perforation, said perforation in said anti-coring device being of circular cross section and having a diameter at least as great as the diameter of said shank receiving perforation.

Claim 21

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface facing the cutting direction and subject to coring, said mounting means having a perforation therein adapted to receive the shank of a bit, said shank receiving perforation forming an opening in said at least one surface, said anti-coring device comprising a disposable element adapted to lie in abutment with and substantially cover said at least one surface of said mounting means and having a peripheral shape substantially the same as that of said at least one surface subject to coring, means for detachably maintaining said anti-coring device in abutment with said at least one surface of said mounting means, said anti-coring device having a perforation therethrough, said perforation in said anti-coring device being so positioned in said anti-coring device as to be coaxial with said shank receiving perforation when said anti-coring device is maintained in abutment with said at least one surface of said mounting means, whereby said shank of said bit will extend through said perforation in said anti-coring device and into said shank receiving perforation, said shank receiving perforation in said mounting means and said bit shank being of circular cross section and so sized that said bit shank is rotatable within said shank receiving perforation, said perforation in said anti-coring device being of circular cross section and having a diameter at least as great as the diameter of said shank receiving perforation.

Claim 22

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface subject to coring, said mounting means having a shank receiving perforation therein to receive the shank of a bit and forming an opening in said at least one surface, said bit being of the type having an elongated shank terminating at its forward end in a cutting tip and terminating at its rearward end in an abutment surface adapted to be in abutment with a gauge determining abutment surface in association with the rearward end of said shank receiving perforation, said anti-coring device comprising a disposable element adapted to lie in abutment with and substantially cover said at least one surface subject to coring and having a peripheral shape substantially the same as that of said at least one surface subject to coring, said anti-coring device having a perforation therethrough of a diameter at least as great as that of said shank receiving perforation to receive said shank of said bit and means to detachably affix said anti-coring device to said mounting means in abutment with said at least one surface subject to coring with said perforation of said anti-coring device coaxial with said shank receiving perforation.

Claim 23

An anti-coring device for use with bit and mounting means assemblies mounted on the driven elements of mining machines, digging machines and earthworking machines wherein each of said mounting means has at least one forward surface subject to coring, said mounting means having a shank receiving perforation therein to receive the shank of a bit and forming an opening in said at least one surface, said bit being of the type having an elongated shank terminating at its forward end in a cutting tip and terminating at its rearward end in an abutment surface adapted to be in abutment with a gauge determining abutment surface in association with the rearward end of said shank receiving perforation, said anti-coring device comprising a disposable element adapted to lie in abutment with and substantially cover said at least one surface subject to coring and having a peripheral shape substantially the same as that of said at least one surface subject to coring, said anti-coring device having a perforation therethrough of a diameter at least as great as that of said shank receiving perforation to receive said shank of said bit and means to detachably affix said anti-coring device to said mounting means in abutment with said at least one surface subject to coring with said perforation of said anti-coring device coaxial with said shank receiving perforation.